Tool



C. H. SCHMIDGALL.

TOOL.

APPLICATION man FEB. 24. |920.

1,438,931 Patented Dec. 12, 1922.

Patented l2, W2K,

`treat i CARL HENRY SCHMDGALL, QEDRIA, ILLIENDES.

TOUL.

Application led February 1920. Serial No. 361,019.

to which it appertains to make and use the same.

rlhis invention relates to improvements in that class of edofe tools used for cutting` metals, and known as cold ohisels, and those used for chiseling and working;- stone, though said invention is applicable to other form ot' tools as Well.

The invention further relates to a tool ot the `class described,` the cutting; lportion ot which may be separated from the main or handle portion when it hasbeenrendered unfit for work after long; use and restored to lproper working,` condition and replaced in the handle, or an entirely new portion substituted. i

The main object of my inventionis 'to provide a tool of two main portions that are separable from one another, the cutting portion having a shank. to trictionally engage` the other by which ity is heldin placa and to furnish means 'lor positively separatin V the two. l y l Another Objectis that of providingy a tool of the nature described having a cutting` portion and handle'portion, held together by lfriction and separable from one anothei-, and to furnish means 'for positively separatingthem,` such means in no way interfering with the use of the tool and in fno way actino' to accidently cause separation ottheparts while the tool is `at work.

ln the appended drawing,

Figure l is a longitudinal' section of the complete tool in one of its forms.

Figures 2 and 3 show part of the handle portion of thetool and a detachable cutting portion, respectively, in perspective.

`Figure e shows in perspectivev one ot the portions for assisting; in the removal of the cutting portion of the tool," i

Figure 5 is a si le elevation of parts shown in Figure 1. produced on a much larger `by rivets or the like. l

Figure 6 is a longitudinal section of part of the body of a tool of a modified forrm and Figure Y` is a plan of the same.

A cold chisel or a chisel for stone work after being used some time loses its forni and usefulness and must be reshaped, retempered and ground. lWhen this has been done a `ewtimes the tool is practically unfit 1for further use and must be discarded. y

rlhe purpose herein is that the handle portion of the body is a permanent partjnew cutting portions l `eing supplied from a number lrept on hand as often as desired in order `thatTthe tool will be kept at its highest eciency at all times to the end that more worlr and better work Imay be done in a given time. The ability to change the cutting portion as often as desired thus gives the work- `man thD required vform oiE an edge at any time. And combined with this is the advantage ot easily removingr the cutting portion cn occasionby an ejecting means carriedin the handle portion. i

l is th body or handleportion ofthe form "of tool shown in Figure l, which is provided with a central longitudinal bore 2 This bore opens through one end ot the handle andat itsother end opens into a tapered socket 3 which receives a correspondingly i tapered shank t or' abutting member 5 which i has a shoulder 6 to abut upon the end of the said handle l.. y A y 7 is a member seated in the bore 2 near the socket 3. lt has a portion cut away at one side leavifg arecess 8 and the point ot a screw Qin the side ot the handle engages therein which permits though limits thelon# gitudinal movement of said member in the bore. p The said member is further cut away fat one side at its extremity remote from the socket 3 leaving but substantially one `halt lof the material and forming; a recess lObetween 'the saine and the wallotthe bore 2,.

TWithin the bore at its opposite end is arod or 1l slidable therein adapted atv times to proJect from the endr ot the handley as showin` The opposite end ot said bar or rod is spaced some distance from the member 7 and a trigger-portion lfZis interposed, being `connected to the said rod by a iiatspring 13 securedto each of the described portions as tndnelly in snidbore inward from the seat, there being n recess between tbe rear or inner end of the membel` and the Wall of the bore, a rod lying Within the bore adapted to be projected. from the opposite end of the body,

n trggerportion adjoining the inner end of the rod in position to Contact with its inner end and ha'vmg an extenslon projectmg laterally outside the body, e flexible member affixed to the sides of and connecting the rod and said trigger-portion, the latter being 

